I expect a vast sea of lawsuits. There are multiple ways that things can be enforced or not. But for some things, sure, if say, both enforcement duty and presidential pardons are used or not used to fit, then for these cases, illegal doesn't matter anymore. "It's not illegal if the president does it", was it?

In the case of taking early retirement, or accepting a pile of money for doing X / nothing, then you better be somewhat certain that it will last long enough.